/*
 * Copyright 2012 Gregor Schauer
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package at.schauer.gregor.vienna.convert.commons;

import at.schauer.gregor.vienna.convert.provider.AbstractConverterProvider;
import at.schauer.gregor.vienna.exception.ViennaException;
import org.apache.commons.convert.ConversionException;
import org.apache.commons.convert.Converter;
import org.apache.commons.convert.Converters;

/**
 * @author Gregor Schauer
 */
public class CommonsConvertConverterProvider extends AbstractConverterProvider<Converter> {
	@Override
	public <S, T> Converter<S, T> getConverter(Class<S> sourceClass, Class<T> targetClass) {
		try {
			return Converters.getConverter(sourceClass, targetClass);
		} catch (ClassNotFoundException ignored) {
			return null;
		}
	}

	@Override
	@SuppressWarnings("unchecked")
	public <X, Y> Y convert(X source, Class<Y> targetClass) {
		try {
			Converter<X, Y> converter = getConverter((Class<X>) source.getClass(), targetClass);
			if (converter == null) {
				throw new ConversionException("Cannot convert " + source.getClass() + " to " + targetClass);
			}
			return converter.convert(source);
		} catch (ConversionException e) {
			throw new ViennaException(e);
		}
	}
}
